Liquid Electrolyte Composition, and Electrochemical Cell Comprising Said Electrolyte Composition
US-2024347772-A1 · Oct 17, 2024 · US
Lithium ion secondary battery and production method thereof
US2021083296A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2021083296-A1 |
| Application number | US-202017013347-A |
| Country | US |
| Kind code | A1 |
| Filing date | Sep 4, 2020 |
| Priority date | Sep 12, 2019 |
| Publication date | Mar 18, 2021 |
| Grant date | — |
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Abstract
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A lithium ion secondary battery includes: a positive electrode having a positive electrode active material layer on a surface of a positive electrode collector; a negative electrode having a negative electrode active material layer on a surface of a negative electrode collector; and a nonaqueous electrolyte. The positive electrode, the negative electrode, and the nonaqueous electrolyte are accommodated in a battery case. The nonaqueous electrolyte contains γ-butyrolactone as a main component of a nonaqueous solvent. A BOB ion-derived coat is formed on the surface of the positive electrode active material layer. A VC-derived coat is formed on the surface of the negative electrode active material layer.
First claim
Opening claim text (preview).
1 . A lithium ion secondary battery including: a positive electrode having a positive electrode active material layer on a surface of a positive electrode collector; a negative electrode having a negative electrode active material layer on a surface of a negative electrode collector; and a nonaqueous electrolyte, the positive electrode, the negative electrode, and the nonaqueous electrolyte being accommodated in a battery case, wherein the nonaqueous electrolyte contains γ-butyrolactone as a main component of a nonaqueous solvent, a vinylene carbonate-derived coat is formed on the surface of the negative electrode active material layer, and a bis(oxalate)borate ion-derived coat is formed on the surface of the positive electrode active material layer. 2 . The battery of claim 1 , wherein the positive electrode contains lithium iron phosphate having an olivine crystal structure as the positive electrode active material. 3 . The battery of claim 1 , wherein the negative electrode contains a carbon material as the negative electrode active material. 4 . The battery of claim 2 , wherein the negative electrode contains a carbon material as the negative electrode active material. 5 . The battery of claim 1 , wherein the nonaqueous electrolyte contains, as the nonaqueous solvent, dibutyl carbonate in addition to the γ-butyrolactone. 6 . The battery of claim 2 , wherein the nonaqueous electrolyte contains, as the nonaqueous solvent, dibutyl carbonate in addition to the γ-butyrolactone. 7 . The battery of claim 3 , wherein the nonaqueous electrolyte contains, as the nonaqueous solvent, dibutyl carbonate in addition to the γ-butyrolactone. 8 . The battery of claim 4 , wherein the nonaqueous electrolyte contains, as the nonaqueous solvent, dibutyl carbonate in addition to the γ-butyrolactone. 9 . A production method of a lithium ion secondary battery including: a positive electrode having a positive electrode active material layer on a surface of a positive electrode collector; a negative electrode having a negative electrode active material layer on a surface of a negative electrode collector; and a nonaqueous electrolyte, the positive electrode, the negative electrode, and the nonaqueous electrolyte are accommodated in a battery case, the production method comprising: obtaining a battery assembly by accommodating the positive electrode and the negative electrode in the battery case and further encapsulating the nonaqueous electrolyte into the battery case and sealing the battery case, the nonaqueous electrolyte being obtained by dissolving a lithium salt in a nonaqueous solvent containing γ-butyrolactone as a main component and containing vinylene carbonate and lithium bis(oxalate)borate, and subjecting the battery assembly to an initial charge process performed, thereby forming a coat derived from the vinylene carbonate on the surface of the negative electrode active material layer and forming, on the surface of the positive electrode active material layer, a coat derived from bis(oxalate)borate ions generated by ionization of the lithium bis(oxalate)borate.
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Manufacturing or production processes characterised by the final manufactured product · CPC title
Energy storage using batteries · CPC title
characterised by the solvents · CPC title
Construction or manufacture · CPC title
in the form of layers, e.g. coatings · CPC title
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- What does patent US2021083296A1 cover?
- A lithium ion secondary battery includes: a positive electrode having a positive electrode active material layer on a surface of a positive electrode collector; a negative electrode having a negative electrode active material layer on a surface of a negative electrode collector; and a nonaqueous electrolyte. The positive electrode, the negative electrode, and the nonaqueous electrolyte are acco…
- Who is the assignee on this patent?
- Mazda Motor, Ube Industries, Eliiy Power Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01M10/0525. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Mar 18 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).